removeUnusedAccounts.php

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<?php
require_once __DIR__ . '/Maintenance.php';

class RemoveUnusedAccounts extends Maintenance {
    public function __construct() {
        parent::__construct();
        $this->addOption( 'delete', 'Actually delete the account' );
        $this->addOption( 'ignore-groups', 'List of comma-separated groups to exclude', false, true );
        $this->addOption( 'ignore-touched', 'Skip accounts touched in last N days', false, true );
    }

    public function execute() {

        $this->output( "Remove unused accounts\n\n" );

        # Do an initial scan for inactive accounts and report the result
        $this->output( "Checking for unused user accounts...\n" );
        $del = array();
        $dbr = wfGetDB( DB_SLAVE );
        $res = $dbr->select( 'user', array( 'user_id', 'user_name', 'user_touched' ), '', __METHOD__ );
        if ( $this->hasOption( 'ignore-groups' ) ) {
            $excludedGroups = explode( ',', $this->getOption( 'ignore-groups' ) );
        } else {
            $excludedGroups = array();
        }
        $touched = $this->getOption( 'ignore-touched', "1" );
        if ( !ctype_digit( $touched ) ) {
            $this->error( "Please put a valid positive integer on the --ignore-touched parameter.", true );
        }
        $touchedSeconds = 86400 * $touched;
        foreach ( $res as $row ) {
            # Check the account, but ignore it if it's within a $excludedGroups group or if it's touched within the $touchedSeconds seconds.
            $instance = User::newFromId( $row->user_id );
            if ( count( array_intersect( $instance->getEffectiveGroups(), $excludedGroups ) ) == 0
                && $this->isInactiveAccount( $row->user_id, true )
                && wfTimestamp( TS_UNIX, $row->user_touched ) < wfTimestamp( TS_UNIX, time() - $touchedSeconds )
                ) {
                # Inactive; print out the name and flag it
                $del[] = $row->user_id;
                $this->output( $row->user_name . "\n" );
            }
        }
        $count = count( $del );
        $this->output( "...found {$count}.\n" );

        # If required, go back and delete each marked account
        if ( $count > 0 && $this->hasOption( 'delete' ) ) {
            $this->output( "\nDeleting unused accounts..." );
            $dbw = wfGetDB( DB_MASTER );
            $dbw->delete( 'user', array( 'user_id' => $del ), __METHOD__ );
            $dbw->delete( 'user_groups', array( 'ug_user' => $del ), __METHOD__ );
            $dbw->delete( 'user_former_groups', array( 'ufg_user' => $del ), __METHOD__ );
            $dbw->delete( 'user_properties', array( 'up_user' => $del ), __METHOD__ );
            $dbw->delete( 'logging', array( 'log_user' => $del ), __METHOD__ );
            $dbw->delete( 'recentchanges', array( 'rc_user' => $del ), __METHOD__ );
            $this->output( "done.\n" );
            # Update the site_stats.ss_users field
            $users = $dbw->selectField( 'user', 'COUNT(*)', array(), __METHOD__ );
            $dbw->update( 'site_stats', array( 'ss_users' => $users ), array( 'ss_row_id' => 1 ), __METHOD__ );
        } elseif ( $count > 0 ) {
            $this->output( "\nRun the script again with --delete to remove them from the database.\n" );
        }
        $this->output( "\n" );
    }

    private function isInactiveAccount( $id, $master = false ) {
        $dbo = wfGetDB( $master ? DB_MASTER : DB_SLAVE );
        $checks = array(
            'revision' => 'rev',
            'archive' => 'ar',
            'image' => 'img',
            'oldimage' => 'oi',
            'filearchive' => 'fa'
        );
        $count = 0;

        $dbo->begin( __METHOD__ );
        foreach ( $checks as $table => $fprefix ) {
            $conds = array( $fprefix . '_user' => $id );
            $count += (int)$dbo->selectField( $table, 'COUNT(*)', $conds, __METHOD__ );
        }

        $conds = array( 'log_user' => $id, 'log_type != ' . $dbo->addQuotes( 'newusers' ) );
        $count += (int)$dbo->selectField( 'logging', 'COUNT(*)', $conds, __METHOD__ );

        $dbo->commit( __METHOD__ );

        return $count == 0;
    }
}

$maintClass = "RemoveUnusedAccounts";
require_once RUN_MAINTENANCE_IF_MAIN;